Paul,

Just checking re. using gfix manually, a number of users forget that gfix
will run from the command line, and has a lot more options available to it,
than appear in the Server Manager, and that a "gfix" run from the Server
Manager will not do everything that gfix from the command line will do.

If none of the utilities will work, including and especially gfix, you have
a major problem, as the only way that your database could get fixed would be
to patch the offending page - and there are no utilities to do this. It
would have to be done manually if it is fixable at all.

From a checksum perspective, I believe the checksum mechanism was turned off
for performance reasons on Unix 4.0 ODS 8.0, and on all other platforms at
ODS 9.0 (4.2 ?)

cf.

2. Checksum

" If -ignore is specified, the checksum is specifically checked in
validate instead of in the engine. If the checksum is found to
be wrong, the error:

"Checksum error on page xxx"

is returned. This is harmless when found by validate, and the page
will still continue to be validated--if data structures can be
validated on page, they will be. If -mend is specified, the page
will be marked for write, so that when the page is written to disk
at the end of validation the checksum will automatically be
recalculated.

Note: For 4.0 only Windows & NLM platforms keep page checksums."

My concern is that the error is being returned by a page early on in the
database, and it is a page that is needed for a connection.

As such it may be possible to fix your database, but it will take time and
effort.

Regards
Paul